Sleepy bear

This picture taken on May 13, 2014 shows a giant panda sleeping in its enclosure in Hangzhou zoo in Hangzhou, east China's Zhejiang province. Giant pandas, notorious for their low sex drive, are among the world's most endangered animals. Fewer than 1,600 pandas remain in the wild, mainly in China's Sichuan province, with a further 300 in captivity around the world.

This picture taken on May 13, 2014 shows a giant panda sleeping in its enclosure in Hangzhou zoo in Hangzhou, east China's Zhejiang province. Giant pandas, notorious for their low sex drive, are among the world's most endangered animals. Fewer than 1,600 pandas remain in the wild, mainly in China's Sichuan province, with a further 300 in captivity around the world. (STR / AFP/Getty Images)

This picture taken on May 13, 2014 shows a giant panda sleeping in its enclosure in Hangzhou zoo in Hangzhou, east China's Zhejiang province. Giant pandas, notorious for their low sex drive, are among the world's most endangered animals. Fewer than 1,600 pandas remain in the wild, mainly in China's Sichuan province, with a further 300 in captivity around the world.STR / AFP/Getty Images